Simple tools, built plainly.
Calcora started from a small frustration: most calculator websites bury a single useful number under autoplay video ads, pop-ups and walls of unrelated text. We wanted something closer to a good pocket calculator — fast to open, obvious to use, and honest about what it can and can't tell you.
Every calculator on this site runs entirely in your browser. Nothing you type is sent to a server, stored in a database, or used to build a profile — the math happens on your device and stays there. We currently cover finance (loans, interest, tax, discounts), health (BMI, age), and a handful of everyday tools (percentages, unit conversion, tipping), with more planned.
We're not financial advisors, doctors, or accountants, and nothing on this site is professional advice — see our disclaimer for the specifics. Every result here is a mathematical estimate based on the numbers you enter; for decisions with real financial or health consequences, please confirm with a qualified professional.
Found a bug, have a calculator you'd like us to add, or just want to say hello? Visit our contact page — we read everything that comes in.